Process for producing a waterproof sheeted substance and product produced thereby



Patented lll/liar. 2, i926.

srarss WILLIAM T. HOFMANN, 0F CHICAGO, ILLXNOIS, ASSIGNOR TGBECKMAN-DAWSON .ROOFING COMPANY, 0F CHICAGO, ILLINOIS, A CGRPORATIO 0FlL-LINQIS.

PROCESS IEO PRODUCING A W'ATERPROUF SHEETED SUBSTANE AND PRODUCTlFR-DUCED THEREBY.

Application tiled March i7, 1922. Serial No. 544,5Sf. f

To all whom it may concern.:

Be it known that ll, lVrLLrAM T. Hor-' MANN, a citizen of the UnitedStates, residing in the city of Chicago, county of Cook, and Stateof'lllinois, have invented certain new and useful Improvements inProcesses for Producing a Waterproof Slice-ted Substance and ProductProduced Thereby, of which the following is a specification.

This invention relates to a, process and apparatus for producing "awaterproof sheeted substance and refers more particularly to a processfor producing sheeted siding o'r lsheeting material used by the buildingtrades.

Among` the objects of the invention are to Vprovide a processiorproducing a sheeted material which may be used as a siding for dwellingsin place of lath for interiorconstruction and for numerous otheruseswhere a waterproof sheeted -material having a rough surfacing layermay be employed.

Fig. 1 is a diagrammatic side elevational view fof the apparatus,

Fig. 2 is a sectional view of the finished sheet with the materialsurfaced with a coarse grit. v

Fig. 3 shows a sectional view of the material having a finer coating ofcement or stucco imposed upon the coarse grit.

' Referring to the details of the drawings, a vfelted fibrous base 1,such as commonly used in the prepared rooingindustry, 'is saturatedv andcoated with a coating substance Q contained 'in a tanlr 2a. rl`he sheetafter being coated in the saturating tank, is passed f *over roll 3 andbetween the pressure roll 4 A,and bed roll 5 where the coating substance``"fis evenly distributed over the sheet.

The coated sheet with the viscous waterproofing substance still in asemi-solid or plastic state, is passed over a blower comprising aA widenozzle or shower 6 which has apluralvity ci small holes 7 in the bottomthereof, through which an air blast under high pressure delivered to theshower through the line 8 is blown directly onto the surface ofThesheet. Oneor more oi these blast nozzles will be positioned over thesheet according to its width. The air blast blowing directly upon theviscous coating substance produces airirregular surface with innumerablefurrows and upstainding portions which set simultaneously with theirforming due to the cooling elect of the air blast. Onto this jagged,coarsely vdenticulated'surface is applied a granular surfacing materialof coarse v grit 9 by means of a hopper l0, which may be rolled toproduce a flat surface or may be left in an irregular1l state and stuccoor cement applied thereto. in using the mate- .or stucco coating applieddirectly thereto.

ln a similar manner the. blast may be applied when the sheet is to beused for interior work in the place of wood or metal lath.

ln Figs. 2 and 3 at l is shown the base or ielted` lfibrous material lwhich is coated with a waterproofing substance 2.' Filling the unevensurface of the Acoating substance is a coarse grit 9. lin Fig. 2 thecoarse grit is left intact and produces. a rough uneven surface. linFig. 3 this coarse surface has bteelnltinished with stucco or cement asshown a The fact that the surfacing material is underlaid with awaterprooiing substance prevents the cracking dueto the inroads ofmoisture and the itlexible4 character of the sheetcombined with itsqualities prevents the cracking anddisinte gration normally attendantwith the rigid stucco or. plaster covering used commonly in relativelycheap exterior surfacing. v

For temporary structures a material of 'this type is particularlyadapted for use where an attractive siding is desired to take the placeoit' stucco, metai or wood. While perhaps not as permanent as wood orsometimes oi stucco, it will nevertheless endure the .ravages oftheelements for considerable period and the cheapness of tliematerial andits application to a surface maires it very attract-ive for innumerable-types of construction. v

l claim as my invention:

l. A-process :tor producing a waterproof sheeted.materiah'consisting inpassing the sheet4 through a waterproof saturant and subjecting theapplied coating to the roughening edect of a. finely divided air blastto set the coating and produce aV denticulated surface, applying coarsesurfacing material to the roughened coating and imposing a cementitiouscovering thereon.

2. A waterproof sheet, consisting of a feltcd fibrous hase saturated andcoated with a waterproofing substance, one surface of the sheet havingrirregular 'furrows and raised portions and having a coarse granularsurfacing applied thereto.

A waterprootl sheet, consisting of a telted fibrous base saturated andcoated with V a waterproofing substance, the coating sul :stance hat ingirregular furrows and ridged portions on one surface and covered with acoarse granular surfacing material and a cenientitious coating.

4. A process for producing a waterproof shceted material. consisting insaturating and coating a sheet with a waterproofing substance, passingthe coated sheet through a roughening operation to cause the coatedsubstance to form an irregular furrowed and ridged denticulated surface,applying a surfacing material to the roughened irreguiar surface of thesheet, and rolling said surfacing material to produce a substantiallyHat surface.

5. A process for producing a Waterproof sheeted material, consisting inpassing the sheet through a waterproof saturant and 4subjecting theapplied coating to the roughenng effect of a nely divided air blast toset the coating and produce a denticulated surface, applying coarsesurfacing material to the roughened coating and imposing a cementitiouscovering thereon.

WILLIAM T. HOFMANN.

